Improvement in tool-carrier attachments to screw-machines



UNITED 'STATES PATENT Qrrrca.

JOHN YULE, OF PATERSON, NEW JERSEY, ASSIGNOR TIO MGNAB 85 HARLIN MANUFACTURING COMPANY, OF NEW YORK, N.

IMPROVEMENT 1N TOOL-CARRIER ATTAcHMENTs To SCREW-MACHINES.

Specification forming part of Letters Patent No. l 72,682, dated January 25, 1876; applicationled A December 3, 1875.

To all whom it may concern:

Be it known that I, JOHN YULE, ot' Paterson, Passaic county, New Jersey, have invented a new and Improved Tool-Carrier Attachment to Screw-Machines, dto., ot' which the following is a specication:

Figures l, 2, and 3 are top views of my improved tool-carrier attachment, showing it in different positions on its shank. Fig. et is an end View ot the same; and Fig. 5, a vertical section thereotl on the line o c, Fig. l.

Similar letters of reference indicate corresponding parts in all the figures.

The object of this invention is to produce a movable tool-carrier attachment for use on the circular head orturret ot' a screw-machine.

The screw-machine of the kind which I desire to improve is made with a circular head or turret, having radial sockets, for the reception of the various tools or dies used thereon, and each tool insert-ed in said stock remains a xture' therein until it is withdrawn and re.

placed by another, but is not capable of lateral rectilinear adjustment. The tools used on such machines are mostly of an expensive kind and of the best character, as the work to be performed by them should be exact and well-finished. The blanks placed in machines of the aforementioned kind are .usually of cast metal, and have to be trimmed more or less before the true outline is imparted to them with the nishing-tools. Now, I have found that the expensive tools used in the circular heads of screw-machines are rapidly worn and greatly injured by contactv with the generally sandy surface of rough castings, and have devised my improved tool-holder for the purpose of using a roughing-tool which shall be adjustable laterally on the head-stock, andv capable of facing, perforatin g, mortisin g, and generally preparing the blanks for the inal touches of the liner tools.

My invention consists in colnbining a sliding tool-carrier with a feed screw or mechanism, and with a transverse bar or holder, which has a projecting pin or shank ot a size to t 011e of the radial apertures of the circular head or turret.

In the drawing, the dotted circle A represents part of the outline of the circular head or turret ot' a screw-machine or similar machine. B is a transverse bar or holder, provided with a projecting shank or pin, a, ot' a size and shape to tit one of the radial apertures or cavities ot' the turret A, in a manner in which the Shanks ot' the tools now usually applied to such turrets are generally fitted and secured therein. The pin a projects at right angles from the back ot' the har B, as shown.

O is the `sliding tool-carrier, made with a dovetailed or rabbeted groove at the back to tit the correspondinglyshaped face otl the bar B, as clearly shown in Fig. 5, and to be laterally movable thereon.

D isascrew hungin the hollow ot' the bar B, iu the direction ofthe length ofthe same, and fitted through a nut, b, which connects with the carrier C, as also shown in Fig. 5, and by dotted lines in Fig. l. By turning the handle cl ot' 'the screw D the carrier will be traversed along the face of the bar B, which remains stationary. The carrier O is at its front provided with a socket, e, for the reception ot' the tool F. (Indicated in Figs. l, 2, and 3.) In this socket the tool is fastened by a set-screw for other means.

Now, it will be readily seen that when a blank, E, (indicated by dotted lines in Figs. 1, 2, and 3, and which is secured inthe machine parallel to the axis of the shank on) is to be trimmed, say. along its end, as in Fig. l, the carrier O with its tool F may' be moved sidewise until the tool is in line with the circle of the blank to be trimmed, and that the tool may be traversed back and forth by turning the screw D until the end has been properly trimmed. When, however, the saine tool is to be used for boring into the blank, as in Fig. 2, it is adjusted nearer to a line with the axis of the shank a, and still nearer, as in Fig. 3, when a smaller hole is to be cut.l In fact, by this traversing attachment the tool can be placed in any suitable position with reference Ato the blank, even to trim the outer periphery.- I propose to provide the turret ot' a screw-machine with one such adjustable tool-carrier, at most with -two, and to secure therein an inexpensive trimming or roughing tool, leaving the remaining sockets of the turret iilled with the ner tools usually secured therein, and to triln che cast blanks in the rough with theA tool `held in said adjustable carrier. .The liner tools may then still be used for threading, boring, 'and yotherwise finishing the blanks, but will be relieved of just that part of the Work heretofore imposed on them,\vl1ichproved most injurious to them,'a'nd for which, 'in reality, less perfect tools :rhaybe used.

By my attachment one inferior tool may be used for vperforming all the Work for which, 'wereit not vfor my attachment, four, ive, six, or even more separate lcools would be required on the revolving turret, and the carrying capacity of the turret is, therefore economizedv in acorresponding degree. .y i

1 claim as my invention- The adjustable tool-carrier G, combined With the feed-screw D, and with the transverse bar B,.Which has the shank a, all arranged for use on the turret of a screw-machine, substantially as herein shown and described.

4 JOHN YULE.

. Witnesses: p

A., V. BRIEsEN, OTTO A. WEIDNER. 

